Patent · US Active

Stabilization of polymers with styrenated-p-cresols

US8193260B2 · kind B2 · utility

1Cited by

22References

27Claims

0Family size

Assignee

CHEMTURA CORPORATION · US

Inventors

Michael E. Gelbin · Middlebury, US
Jonathan S. Hill · Chevalleyres, CH
Maurice Power · Manchester, GB

Key dates

Filing date	Feb 11, 2008
Grant date	Jun 5, 2012
Priority date	—
Expiry date	Oct 10, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/13
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Disclosed herein is a process for the preparation of a mixture of styrenated p-cresol species that is liquid at room temperature and has a viscosity of less than 40,000 cps at 25° C., wherein said process affords 2,6-distyrenated p-cresol assaying at 70% minimum by GC area percent, comprising reacting styrene with p-cresol at a molar ratio of 1.85 to 2.1:1, respectively, in the presence of an acid catalyst at elevated temperature, wherein said mixture comprises monostyrenated-p-cresol, distyrenated-p-cresol, and tristyrenated-p-cresol and exhibits an acid number of less than 0.1 mg KOH/gram.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.